Newgate New Covent Garden Alarm Clock, Linen White The Newgate New Covent Garden Alarm Clock in Linen White features a classic design with a working real hammer to bell alarm and satin Linen White finish. Metal Case. Glass Lens. 1 year movement guarantee. Dimensions: 7" x 2.5" x 5" (18 x 6.5 x 12.75cm). Requires 1 AA battery (not included).